#3

3/main.lua

@@ -0,0 +1,77 @@
+
+math.randomseed(os.time())
+
+local MOONS = {}
+local t_moon = nil
+for i = 1, 10 do
+	local color = {math.random(200),math.random(100),math.random(200)}
+	local moon = {500+math.random(400)-200,200+math.random(400)-200,math.random(10)+1,color}
+	table.insert(MOONS, moon)
+	if moon[2] > 50 and (not t_moon or math.random()>0.5) then
+		t_moon = moon
+	end
+end
+
+local function generate_planet_canvas ()
+	local canvas = love.graphics.newCanvas()
+	local shader = love.graphics.newShader([[
+		vec4 effect( vec4 color, Image texture, vec2 texture_coords, vec2 screen_coords )
+        {
+            vec4 texcolor = Texel(texture, texture_coords);
+			if (color.r == 0.8 && color.g == 1 && color.b == 0.5) {
+				float dist = sqrt(pow(screen_coords.x-500, 2)+pow(screen_coords.y-100, 2));
+				return vec4(0.8, 1, 0.5, 1) * min(1, 0.05*(208-dist));
+			} else if (color.r == 1 && color.g == 1 && color.b == 1 && screen_coords.y<100 && (pow(screen_coords.x-500, 2)+pow(screen_coords.y-100, 2) < 200*200)) {
+				return vec4(0, 0, 0, 0);
+			} else {
+            	return texcolor * color;
+			}
+        }
+	]])
+	love.graphics.setCanvas(canvas)
+	love.graphics.setShader(shader)
+		love.graphics.setColor(255*0.8,255*1,255*0.5,255)
+		love.graphics.circle("fill", 500, 100, 200)
+		love.graphics.setColor(255,255,255,50)
+		for i = 1, 40 do
+			love.graphics.ellipse("line", 500, 125, 300-i, 50-i*1/6 )
+		end
+		for _, moon in ipairs(MOONS) do
+			love.graphics.setColor(moon[4])
+			love.graphics.circle("fill",moon[1],moon[2],moon[3])
+		end
+	love.graphics.setShader()
+	love.graphics.setCanvas()
+	return canvas
+end
+
+--------------------------------------------------------------------------------
+
+local PLANET = generate_planet_canvas()
+
+local SCREENS = {}
+
+SCREENS[1] = function (t)
+	t = t * 0.1
+	love.graphics.draw(PLANET)
+
+	love.graphics.setColor(255,255,255,255)
+	love.graphics.circle("fill", 400*(1-t)+t_moon[1]*t, 600*(1-t)+t*t_moon[2], math.min(0, 50*(t-1)))
+end
+
+local screen_id = 1
+local time = 0
+
+--------------------------------------------------------------------------------
+
+function love.load ()
+
+end
+
+function love.update (dt)
+	time = time + dt
+end
+
+function love.draw ()
+	SCREENS[screen_id](time)
+end